Role of lamp type in conventional batch and micro-photoreactor for photocatalytic hydrogen production

Vendula Meinhardová; Lada Dubnová; Helena Drobná; Lenka Matějová; Kamila Kočí; Libor Čapek

doi:10.3389/fchem.2023.1271410

Role of lamp type in conventional batch and micro-photoreactor for photocatalytic hydrogen production

Front Chem. 2023 Sep 20:11:1271410. doi: 10.3389/fchem.2023.1271410. eCollection 2023.

Authors

Vendula Meinhardová¹, Lada Dubnová¹, Helena Drobná¹, Lenka Matějová², Kamila Kočí², Libor Čapek¹

Affiliations

¹ Faculty of Chemical Technology, University of Pardubice, Pardubice, Czechia.
² Institute of Environmental Technology, VŠB-Technical University of Ostrava, Ostrava Poruba, Czechia.

Abstract

The use of an irradiation source with a homogeneous distribution of irradiation in the volume of the reaction mixture belongs to the essential aspects of heterogeneous photocatalysis. First, the efficacy of six lamps with various radiation intensity and distribution characteristics is contrasted. The topic of discussion is the photocatalytic hydrogen production from a methanol-water solution in the presence of a NiO-TiO₂ photocatalyst. The second section is focused on the potential of a micro-photoreactor system-the batch reactor with a micro-reactor with a circulating reaction mixture, in which the photocatalytic reaction takes place using TiO₂ immobilized on borosilicate glass. Continuous photocatalytic hydrogen generation from a methanol-water solution is possible in a micro-photoreactor. This system produced 333.7 ± 21.1 µmol H₂ (252.8 ± 16.0 mmol.m^-2, the hydrogen formation per thin film area) in a reproducible manner during 168 h.

Keywords: UV-LED lamp; batch reactor; hydrogen production; intensity; irradiation; micro-photoreactor.

Grants and funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. The Czech Science Foundation (project No. 20-09914S). Infrastructure (project LM2018103).